<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <title>嘻嘻不嘻嘻</title>
  <meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover" />
  <style>
    * {
      border: 0;
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    :root {
      --hue: 223;
      --bg: hsl(var(--hue), 10%, 90%);
      --fg: hsl(var(--hue), 10%, 10%);
      --trans-dur: 0.5s;
      --trans-timing1: cubic-bezier(0.65, 0, 0.35, 1);
      --trans-timing2: cubic-bezier(0.65, 0, 0.35, 1.5);
      font-size: calc(56px + (120 - 56) * (100vw - 280px) / (3840 - 280));
    }

    body,
    input {
      color: var(--fg);
      font: 1em/1.5 sans-serif;
      transition: background-color var(--trans-dur) var(--trans-timing1), color var(--trans-dur) var(--trans-timing1);
    }

    body {
      background-color: var(--bg);
      display: flex;
      height: 100vh;
    }

    .switch {
      display: flex;
      margin: auto;
    }

    .switch__emoji {
      box-shadow: 0.25em 0.25em 0.125em rgba(0, 0, 0, 0.3);
      overflow: hidden;
      pointer-events: none;
      top: 0.25em;
      left: 0.25em;
      width: 1em;
      height: 1em;
    }

    [dir='rtl'] .switch__emoji {
      right: 0.25em;
      left: auto;
    }

    .switch__emoji,
    .switch__emoji:before,
    .switch__emoji:after,
    .switch__emoji-eye,
    .switch__emoji-mouth,
    .switch__emoji-face {
      display: block;
      position: absolute;
    }

    .switch__emoji,
    .switch__emoji:before,
    .switch__emoji:after,
    .switch__emoji-eye,
    .switch__emoji-mouth {
      border-radius: 50%;
    }

    .switch__emoji:before,
    .switch__emoji:after {
      content: '';
      width: 100%;
      height: 100%;
      transform: translateZ(0);
    }

    .switch__emoji:before {
      background-color: #f2c40d;
      box-shadow: -0.25em -0.25em 0.25em #c29d0a inset, 0.1875em 0.1875em 0.25em #f9e286 inset;
    }

    .switch__emoji:after {
      box-shadow: 0 0 0.125em 0.0625em rgba(245, 208, 61, 0.5) inset;
    }

    .switch__emoji,
    .switch__emoji-face {
      transform-style: preserve-3d;
      transition: transform var(--trans-dur) var(--trans-timing2);
    }

    .switch__emoji-eye,
    .switch__emoji-mouth {
      backface-visibility: hidden;
    }

    .switch__emoji-eye {
      border: 0.0625em solid hsl(var(--hue), 10%, 10%);
      border-right-color: transparent;
      border-bottom-color: transparent;
      border-radius: 50%;
      top: 50%;
      left: 50%;
      width: 0.25em;
      height: 0.25em;
      transform: translate(-50%, -50%) rotateY(-22.5deg) translateZ(0.5em) rotateZ(45deg);
    }

    .switch__emoji-eye+.switch__emoji-eye {
      transform: translate(-50%, -50%) rotateY(22.5deg) translateZ(0.5em) rotateZ(45deg);
    }

    .switch__emoji-mouth {
      background-image: radial-gradient(100% 100% at 50% 100%, #f2180d 20%, #f5463d 33%, rgba(245, 70, 61, 0) 35%), radial-gradient(100% 100% at 75% 113%, black 26%, rgba(0, 0, 0, 0) 35%), linear-gradient(rgba(0, 0, 0, 0) 50%, black 50% 55%, hsl(var(--hue), 10%, 10%) 65%);
      top: 50%;
      left: 50%;
      width: 0.5em;
      height: 0.5em;
      transform: translate(-50%, -50%) rotateX(-15deg) translateZ(0.5em);
    }

    .switch__emoji-face {
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      transform: rotateY(0);
    }

    .switch__emoji-face+.switch__emoji-face {
      transform: rotateY(-180deg);
    }

    .switch__emoji-face--sad .switch__emoji-eye {
      background-color: hsl(var(--hue), 10%, 10%);
      border: 0;
      width: 0.1875em;
      height: 0.1875em;
    }

    .switch__emoji-face--sad .switch__emoji-mouth {
      background-image: none;
      border: 0.0625em solid transparent;
      border-top-color: hsl(var(--hue), 10%, 10%);
      transform: translate(-50%, 0) rotateX(-20deg) translateZ(0.5em);
    }

    .switch__input,
    .switch__label {
      -webkit-tap-highlight-color: transparent;
    }

    .switch__input {
      background-color: hsl(var(--hue), 10%, 80%);
      border-radius: 0.75em;
      box-shadow: 0.0625em 0.0625em 0.0625em white inset, -0.0625em -0.0625em 0.0625em hsl(var(--hue), 10%, 80%) inset, 0 0 0 0.125em hsl(var(--hue), 10%, 90%) inset, 0.25em 0.25em 0.125em rgba(0, 0, 0, 0.3) inset, 0.0625em 0.0625em 0.0625em rgba(0, 0, 0, 0.3);
      cursor: pointer;
      display: block;
      width: 2.5em;
      height: 1.5em;
      -webkit-appearance: none;
      appearance: none;
      transition: background-color var(--trans-dur) var(--trans-timing1), box-shadow var(--trans-dur) var(--trans-timing1);
    }

    .switch__input:checked {
      background-color: #0ac213;
    }

    .switch__input:checked+.switch__emoji {
      transform: translateX(100%);
    }

    [dir='rtl'] .switch__input:checked+.switch__emoji {
      transform: translateX(-100%);
    }

    .switch__input:checked+.switch__emoji .switch__emoji-face {
      transform: rotateY(179.99deg);
    }

    [dir='rtl'] .switch__input:checked+.switch__emoji .switch__emoji-face {
      transform: rotateY(-179.99deg);
    }

    .switch__input:checked+.switch__emoji .switch__emoji-face+.switch__emoji-face {
      transform: rotateY(0);
    }

    [dir='rtl'] .switch__input:checked+.switch__emoji .switch__emoji-face+.switch__emoji-face {
      transform: rotateY(-360deg);
    }

    .switch__label,
    .switch__wrapper {
      display: block;
    }

    .switch__label {
      margin-inline-start: 0.5em;
      overflow: hidden;
      position: absolute;
      width: 1px;
      height: 1px;
    }

    .switch__wrapper {
      position: relative;
    }

    @media (prefers-color-scheme:dark) {
      :root {
        --bg: hsl(var(--hue), 10%, 10%);
        --fg: hsl(var(--hue), 10%, 90%);
      }

      .switch__input {
        background-color: hsl(var(--hue), 10%, 20%);
        box-shadow: 0.0625em 0.0625em 0.0625em hsl(var(--hue), 10%, 25%) inset, -0.0625em -0.0625em 0.0625em hsl(var(--hue), 10%, 20%) inset, 0 0 0 0.125em hsl(var(--hue), 10%, 30%) inset, 0.25em 0.25em 0.125em rgba(0, 0, 0, 0.3) inset, 0.0625em 0.0625em 0.0625em rgba(0, 0, 0, 0.3);
      }
    }
  </style>
</head>

<body>
  <label class="switch">
    <span class="switch__wrapper">
      <input class="switch__input" type="checkbox" role="switch" checked />
      <span class="switch__emoji">
        <span class="switch__emoji-face switch__emoji-face--sad">
          <span class="switch__emoji-eye"></span>
          <span class="switch__emoji-eye"></span>
          <span class="switch__emoji-mouth"></span>
        </span>
        <span class="switch__emoji-face">
          <span class="switch__emoji-eye"></span>
          <span class="switch__emoji-eye"></span>
          <span class="switch__emoji-mouth"></span>
        </span>
      </span>
    </span>
    <span class="switch__label">Power</span>
  </label>
</body>

</html>